<?php
/**
 * 加密
 *
 * @param string $str 被加密的字符串
 * @return string
 */
function encrypt($str)
{
    $str = base64_encode($str);
    for ($i = 0; $i < 3; $i++) {
        $str = strrev(substr($str, 7) . substr($str, 0, 7));
    }
    return $str;
}

/**
 * 解密
 *
 * @param string $str 被解密的字符串
 * @return string
 */
function decrypt($str)
{
    for ($i = 0; $i < 3; $i++) {
        $str = strrev($str);
        $str = substr($str, -7) . substr($str, 0, -7);
    }
    $str = base64_decode($str);
    return $str;
}

$str = 
//'JnclJye=0nIxIiOiQHb1NXZyJCLzQTN5QzN3gDNxojIl1Wa091c5NnIsICOzUWN1x1M2ImN1xFN5UWN1xFZjRTN1xlI6IyZz1mIsICMiojIlR2bjJCLiAjI6Iicv';   //响应正常
//'JnclJye=0nIwIiOiQHb1NXZyJCLxYzNxUzN3gDNxojIl1Wa091c5NnIsICMzITN1xVZ3IjN1xVYycjN1xlZ2AjN1xVMlZGN1xlI6IyZz1mIsIyMiojIlR2bjJCLiEjI6Iicv'; //信息未找到
//'JnclJye9xGb15mOiQHb1NXZyJCLwATO2MDO2kDNxojIl1Wa091c5NnIsISN1YWN1xlY3YzN1xFMiVjN1xFZjFTO1x1NmJGO1x1YwYmZ1xlZxcjN1x1NjZGO1xlMmRWN1xlZ2AjN1xVMlZGN1xVN1YWN1xlY3YzN1xFN4YzN1xFOhBjN1xlI6IyZz1mIsICOiojIlR2bjJCLiEjI6Iicv'; 
<<<'EOD'
JnclJye==Qf4YDOwYTO0ATNxojIl1Wa091c5NnIsISMwYmZ1xVNkJGO1xFZ4ETN1xVZwQTN1xFZwE2N1x1NmJGO1x1YwYmZ1xVOkZWN1xVM0U2N1x1YkV2N1xVM1Y2N1xlI6IyZz1mIsISMiojIlR2bjJCLiEjI6Iicv
EOD;

var_dump(json_decode(decrypt($str),1));